1285333398 has 12 divisors (see below), whose sum is σ = 2784889068. Its totient is φ = 428444460.

The previous prime is 1285333381. The next prime is 1285333453. The reversal of 1285333398 is 8933335821.

1285333398 is a `hidden beast` number, since 1 + 28 + 533 + 3 + 3 + 98 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35703688 + ... + 35703723.

It is an arithmetic number, because the mean of its divisors is an integer number (232074089).

Almost surely, 2^1285333398 is an apocalyptic number.

1285333398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1285333398 is an abundant number, since it is smaller than the sum of its proper divisors (1499555670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285333398 is a wasteful number, since it uses less digits than its factorization.

1285333398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71407419 (or 71407416 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 1285333398 is about 35851.5466611972. The cubic root of 1285333398 is about 1087.2729850358.

The spelling of 1285333398 in words is "one billion, two hundred eighty-five million, three hundred thirty-three thousand, three hundred ninety-eight".